Tom Lane wrote:
>
> Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> writes:
> > I was wondering, when we start to reuse a WAL file, do we know that all
> > dirty buffers modified in that WAL file have been flushed to disk?
>
> Yes. At least two checkpoints ago, in fact.
Isn't the following what Bruce asked ?
/*
* mdsync() -- Sync storage.
*
*/
int
mdsync()
{
sync();
if (IsUnderPostmaster)
sleep(2);
sync();
return SM_SUCCESS;
}
regards,
Hiroshi Inoue